Commonwealth Scientific and Industrial Research Organisation

Colin Joseph Waterford

Henry J Banks

Robert Gordon Winks

YongLin Ren

ByungHo Lee

New pesticide compositions comprising an alkyl formate and an isothiocyanic ester are described, as are methods of delivering fumigants and methods of pest control using a combination of fumigants.

Pesticide compositions and methods

A formulation for use in the controlled generation of phosphine comprises a mixture of a particulate phosphide and a water-immiscible compound. The water-immiscible compound is paraffin oil, petroleum jelly, a mixture of these materials or a wax having a melting point in the range 35&deg; C. to 65&deg; C. The phosphide comprises from 65 to 85 per cent (by weight) of the formulation. Such a formulation can be added progressively to water in a reaction chamber. Alternatively, the formulation can be packaged in a water-impermeable container from which a region can be removed to expose the formulation to water vapor in a gas flowing past the container. The water or the water vapor reacts with the phosphide particles as they become exposed to form phosphine. The phosphine, mixed with a carrier (usually air), may be fed into a duct connected to a grain silo, for fumigation of grain stored in the silo.

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McGregor, Australia

Colin Joseph Waterford